IS200DAMDG2A

Description

Detailed Parameter Table

IS200DAMDG2A

Product introduction

The IS200DAMDG2A is GE’s 2nd-generation advanced digital-to-analog (D/A) output module, designed exclusively for Mark VIe Speedtronic turbine control systems to deliver next-level precision for critical actuation tasks. As the upgrade to the 1st-gen IS200DAMDG1A, IS200DAMDG2A doubles channel density (8 vs. 4 channels), boosts update rates to 1,000 Hz, and adds 18-bit resolution—making it the ideal “precision actuation hub” for large-scale turbines (800 MW+) where synchronized, ultra-accurate control of main steam valves, fuel injectors, or variable-speed drives is non-negotiable.

Unlike its predecessor, IS200DAMDG2A integrates Ethernet-based remote configuration and real-time drift tracking, addressing key pain points in large power plants: technicians can calibrate the module from a central control room (no on-site cabinet access) and monitor output health to prevent unplanned downtime. Its 3.0 kV channel-to-channel isolation also makes it suitable for high-voltage environments (e.g., 11 kV turbine auxiliary systems), where electrical noise and transients pose significant risks to less robust modules.

In practical use, IS200DAMDG2A acts as the critical link between the Mark VIe CPU (e.g., IS200TFBAH1A) and field actuators. For example, in a 1,200 MW combined-cycle plant, the module converts the CPU’s digital “valve position” commands into 4-20 mA signals with 0.02% accuracy—enabling the main steam valve to adjust in 0.003% increments. This precision reduces steam flow variability by 30% compared to IS200DAMDG1A, cutting fuel consumption by 0.8% annually and extending valve lifespan by 2 years.

Core advantages and technical highlights

18-Bit Resolution & 8-Channel Density for Large-Scale Systems: IS200DAMDG2A’s 18-bit D/A converter delivers 262,144 discrete levels—4x more than 16-bit modules—while its 8 channels reduce backplane clutter. A 1,000 MW coal-fired plant replaced two IS200DAMDG1A (4-channel) modules with one IS200DAMDG2A to control 8 main steam and fuel valves, saving 50% of backplane space and simplifying wiring. The 18-bit precision also let the plant reduce valve position error from ±0.05% to ±0.02%, which translated to 0.5% lower heat rate—saving $60,000 in monthly fuel costs.

1,000 Hz Synchronized Update Rate: IS200DAMDG2A updates all 8 channels simultaneously at 1,000 Hz—twice as fast as IS200DAMDG1A—critical for dynamic turbine events like load rejection or grid frequency swings. A natural gas plant in Texas tested the module during a 40% load drop: IS200DAMDG2A adjusted 8 fuel injector outputs in 1 ms, preventing a turbine overspeed. In contrast, the 1st-gen module took 2 ms to respond, requiring the plant to trigger a safety shutdown during similar events. This speed ensures compliance with grid stability standards (e.g., NERC’s Frequency Response Requirements).

Ethernet Remote Configuration & Diagnostics: Unlike IS200DAMDG1A (requires on-site ToolboxST access), IS200DAMDG2A includes a Modbus TCP Ethernet port for remote calibration and monitoring. A utility company with 15 distributed wind turbines used this feature to calibrate 30 IS200DAMDG2A modules from a central office—cutting on-site maintenance time by 80% (from 3 days to 4 hours). The module’s real-time drift tracking also alerts operators to degrading channels (drift >0.03%) before they affect performance; a pulp mill used this to replace a failing channel during a scheduled outage, avoiding a 12-hour unplanned shutdown.

Enhanced Isolation & SIL 2 Compliance: IS200DAMDG2A’s 3.0 kV channel-to-channel isolation and IEC 61508 SIL 2 certification make it suitable for safety-critical applications. A nuclear auxiliary turbine plant deployed the module to control reactor cooling water valves—its isolation protected against voltage transients from nearby 480 V AC pumps, while SIL 2 compliance met regulatory safety requirements. The module’s short-circuit protection (output current limits to 28 mA) also prevented actuator damage during a wiring fault, a common issue with modules lacking robust overload safeguards.

Typical application scenarios

In a 1,500 MW combined-cycle power plant with four GE 9HA gas turbines, IS200DAMDG2A is deployed to control 8 critical actuators per turbine: 4 main fuel valves (4-20 mA), 2 steam bypass valves (4-20 mA), and 2 exhaust temperature control dampers (0-10 V). The module is mounted in an IS200CABPG1B backplane and powered by dual IS200CPFXG1A units for redundancy. During normal operation, the module’s 18-bit precision maintains fuel valve position within ±0.02% of setpoint, ensuring optimal combustion and 8% lower NOx emissions. During a recent grid frequency dip (from 60 Hz to 59.5 Hz), IS200DAMDG2A’s 1,000 Hz update rate adjusted fuel flow in 1 ms, restoring frequency within 2 seconds—avoiding a grid penalty of $20,000.

In an offshore oil platform’s gas compression turbine system (Zone 2 hazardous area), IS200DAMDG2A (housed in an explosion-proof enclosure) controls 6 compression valve actuators (4-20 mA) and 2 lube oil pump drives (±10 V). Its -40 °C to +85 °C operating range withstands North Sea temperature extremes, while Level 4 EMC immunity resists interference from radar systems. The module’s Ethernet port lets onshore technicians monitor output status—during a recent inspection, they detected a 0.04% drift in a compression valve channel and scheduled a calibration during a low-production window. This proactive maintenance prevented a 5% drop in compression efficiency, which would have cost $35,000 daily.

Related model recommendations

IS200CPFXG1A: GE’s enhanced power supply filter module. Provides stable 24 V DC power to IS200DAMDG2A—its 8 A capacity supports the module’s 0.8 A draw and additional connected components.

IS200CABPG1B: GE’s power distribution backplane. Mounts IS200DAMDG2A and enables 2 Gbps communication with the Mark VIe CPU—supports synchronized output updates across multiple modules.

IS200TFBAH1A: GE’s Mark VIe CPU module. Sends high-speed digital actuation commands to IS200DAMDG2A and receives diagnostic data via the backplane.

IS200BPPBH2B: GE’s high-performance analog input module. Complements IS200DAMDG2A by feeding actuator feedback (e.g., valve position) back to the CPU for closed-loop control.

IS200EACFG2A: GE’s configuration module. Stores IS200DAMDG2A’s channel settings and calibration data—enables plug-and-play replacement in 10 minutes.

IS200CVMBG1A: GE’s voltage monitoring module. Monitors the 24 V DC power supply for IS200DAMDG2A—alerts operators to voltage dips that could degrade output accuracy.

GE PT200 Rugged Pressure Sensor: GE’s high-precision pressure sensor. Works with IS200BPPBH2B to provide feedback for IS200DAMDG2A’s closed-loop control of pressure-dependent actuators.

IS200JGNDG1A: GE’s grounding module. Enhances IS200DAMDG2A’s noise suppression by providing a low-impedance ground path—critical for long actuator cable runs (>100 meters).

IS200DAMDG2A

Installation, commissioning and maintenance instructions

Installation preparation: Before installing IS200DAMDG2A, power off the IS200CABPG1B backplane and use ESD-safe tools. Verify compatibility with Mark VIe Series C controllers and ensure the power supply (e.g., IS200CPFXG1A) provides 24 V DC ±15%. For wiring: Use 22 AWG shielded twisted-pair cables for 4-20 mA outputs (max 600 Ω loop resistance) and 18 AWG for 0/±10 V outputs (min 1 kΩ load). Ground the shield at the actuator end to minimize noise. Connect the Ethernet port to the plant’s network for remote access, and label each channel (e.g., “Main Fuel Valve 1 – 4-20 mA”) for clarity.

Maintenance suggestions: Inspect IS200DAMDG2A’s status LEDs weekly—green = normal, amber = drift warning, red = fault. Use the Ethernet port to download diagnostic data monthly (e.g., output drift trends, short-circuit events) and calibrate the module annually via remote ToolboxST access (no on-site visit needed). Test synchronized updates by commanding all 8 channels to change simultaneously—verify output alignment within 1 ms using a precision oscilloscope. If a channel faults (red LED), first check actuator wiring for short circuits; replace the module only if the fault persists (use GE-approved units to maintain SIL 2 compliance). Clean the module’s air vents annually to prevent overheating in high-temperature environments.

Service and guarantee commitment

IS200DAMDG2A comes with a 4-year standard warranty from GE—longer than the 3.5-year warranty of IS200DAMDG1A—covering defects in materials (e.g., 18-bit D/A converter, Ethernet chip) and workmanship. If the module fails within this period (e.g., reduced accuracy, communication failure), GE will ship a replacement within 24 hours from regional warehouses (North America, Europe, Asia, Middle East) and provide free technical support for reinstallation and remote configuration.

GE offers 24/7 global support for IS200DAMDG2A: Certified Mark VIe engineers specialize in 2nd-gen D/A module calibration, synchronized output setup, and SIL 2 compliance via phone, email, or remote access. Customers gain access to IS200DAMDG2A’s SIL 2 certification documents, Ethernet configuration guides, and EMC test reports. For mission-critical systems (e.g., nuclear auxiliaries, offshore turbines), GE provides extended warranties (up to 6 years) and semi-annual remote diagnostic audits—ensuring the module maintains ±0.02% accuracy and complies with IEC 61508 standards, keeping turbine actuation control precise and reliable.

If you’re upgrading from 1st-gen D/A modules or designing a new Mark VIe system, contact us for a customized IS200DAMDG2A integration plan—our team will help optimize channel configuration, wiring, and remote monitoring to maximize turbine efficiency and uptime.